62
8. Daily Inspection and Maintenance
63
■
FB-20 (Outdoor Type)
- Gap Inspection
(1) Remove the outdoor cover [33] and the cover [16].
(2) Loosen the fan set screw [17] and remove the fan [15].
(3) Remove the waterproof seal [32].
(4) Insert a gap gauge between the stationary core [6] and the armature plate [20]
and measure the gap. Measure in 3 locations around the circumference.
(5) Adjustment is required if the gap value is near the limit.
- Gap Adjustment
(1) Remove the outdoor cover [33] and the cover [16].
(2) Loosen the fan set screw [17] and remove the fan [15].
(3) Pull off the V-ring [29]
(4) Remove the waterproof seal [32].
(5) Insert a gap gauge between the stationary core [6] and the armature plate [20] and rotate to the right the gap adjusting nuts [12]
that are attached to ends of the stud bolts [8]. If large adjustments to the gap are not possible, decrease the number of adjusting
washers [10]. There are 3 gap adjusting nuts [12]. Adjust these in turn so that 3 positions on the circumference are uniformly at the
required gap.
(6) Turn the power on and off to check brake action.
(7) Attach the waterproof cover [26] so that the gap (A) between its hole and the motor shaft [27] is nearly the same around the entire
circumference. (Only when the waterproof cover [26] has been removed)
(8) Clean the surface of the waterproof seal [32] to remove impurities.
(9) As shown in the construction diagram, install the waterproof seal [32] between the stationary core [6] and the fixed
plate [19]. (Be careful that the waterproof seal [32] does not meander. Otherwise water could leak in.)
(10) Attach the V-ring [29]. Wipe off the lip and surface near the lip of the V-ring [29], lightly coat the lip surface with
grease, and attach. Observe the attaching dimension (B = 7mm).
(11) Thoroughly coat the gap (C) (the gap between adjusting nuts [12] and the stud bolts [8], and the gap between stud
[8] bolts and the fixed plate [19]. ) with waterproof adhesive (Three Bond 1102).
(12) Attach the fan [15] and cover [16] and outdoor cover [33].
Part Number
Part Name
1
Roller
2
Brake release bolt
3
Rubber packing
4
Manual release protection spacer
5
Seal washer
6
Stationary core
7
Electromagnetic coil
8
Stud bolt
9
Brake lining
10
Adjusting washer
11
Spring washer
12
Gap adjusting nut
13
Boss
14
Shaft-retaining C-ring
15
Fan
16
Cover
17
Fan set screw
18
Leaf spring
19
Fixed plate
20
Armature plate
21
Spring
22
Nut
23
Tap-end stud
24
Ball bearings
25
Release lever
26
Bearing cover
27
Motor shaft
28
Waterproof cover
29
V-ring
30
Waterproof cover attachment bolts
31
Waterproof cover gasket
32
Waterproof seal
33
Outdoor cover
Note: The outdoor cover [33] for the vertical
types has a different shape.
Gap Value G (mm)
Required value
(original value)
Limit value
0.6 - 0.7
1.5
Ｂ
Ａ
Figure 8-25
1
2
3
4
5
28
32
29
30
31
6
7
8
9
10
11
12
13
14
17
15
18 19 20 21 22 23 24 25 26 27
16
33
Ｇ
C
